Hassan and Peter from the USA just got to Madrid where they want to explore the city on foot and by public transportation. It's their first time in this big city as well as their first time traveling to a foreign country

What could be the best suggestion for them?

Organizar diez maletas
Planificar el viaje solos
Usar una guía turística
Viajar en crucero

The right answer is, C. Usar una guía turística.

Explanation:

Because according to the reading, both visitors are foreigners and it is the first time they arrive in Madrid, therefore to get to know the city they need a tourist guide to guide them on the journey and to get to know the whole place.

Usar una guía turística

Explanation:

If they want to explore the city on foot and by public transportation and It's their first time in this big city (Si ellos quieren explorar la ciedad a pie y utilizando el transporte público y es su primera ocasión que se encuentran en esta gran Ciudad)

the best suggestión for them is: (La mejor sugerencia, para ellos, es:)

Usar una guía turística

(use a touristic guide)